Richard Petty signed the bottom of the deck lid on the Superbird I used to have. Darrell Alderman signed the antifreeze sticker under the hood of my Challenger conv, but I didn't have enough sense to cover it with clear tape and you can't see it now. Neither one charged a dime, but Darrell Alderman wanted to drive my car around for a bit at Atlanta Dragway…...so I let him! :D